harold wrote: > Dear all, > > Maybe I stared on the monitor for too long, because I cannot find the > bug ... > My script "transition_filter.py" starts with the following lines: > > import sys > > for line in sys.stdin : > try : > for a,b,c,d in line.split() : > pass > > except ValueError , err : > print line.split() > raise err > > The output (when given the data I want to parse) is: > ['0.0','1','0.04','0'] > Traceback (most recent call last): > File "transition_filter.py", line 10, in ? > raise err > ValueError: need more than 3 values to unpack > > What is going wrong here? Why does python think that > I want to unpack the outcome of line.split() into three > values instead of four? I must be really tired, but I just > cannot see the problem. Any clues?? >
The 3 values are coming from the first element in the list '0.0' - change it to '0' and you should get: ValueError: need more than 1 value to unpack. See? it's trying to get a,b,c,d from each element of the list not the whole list. Gerard -- http://mail.python.org/mailman/listinfo/python-list
